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  1. Trailer Hubs and Drums
  2. Dexter Axle
  3. 8 on 6-1/2 Inch
  4. For 7200 lbs Axles
  5. Hub with Integrated Drum
  6. Standard
Dexter 8 on 6-1/2 Hub-and-Drum Assembly for 7,200-lb Axle - 4-Bolt Brake Flange

Dexter 8 on 6-1/2 Hub-and-Drum Assembly for 7,200-lb Axle - 4-Bolt Brake Flange

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Trailer Hubs and Drums
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Shipping Weight: 55 lbs
Trailer Hubs and Drums 8-393-6UC3-A - 16 Inch Wheel,16-1/2 Inch Wheel,17 Inch Wheel,17-1/2 Inch Wheel - Dexter Axle
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Hub-and-drum assembly features a 8 on 6-1/2" bolt pattern and includes bearings, races, seal, grease cap, wheel bolts, and lug nuts. Lowest Prices for the best trailer hubs and drums from Dexter Axle. Dexter 8 on 6-1/2 Hub-and-Drum Assembly for 7,200-lb Axle - 4-Bolt Brake Flange part number 8-393-6UC3-A can be ordered online at or call 800-298-1624 for expert service.
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  • Reviews (2)
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Dexter Axle Trailer Hubs and Drums

  • 8 on 6-1/2 Inch
  • For 7200 lbs Axles
  • Hub with Integrated Drum
  • Standard
  • 16 Inch Wheel
  • 16-1/2 Inch Wheel
  • 17 Inch Wheel
  • 17-1/2 Inch Wheel
  • 5/8 Inch Stud
  • 2475
  • 25580
  • Dexter Axle

Hub-and-drum assembly features a 8 on 6-1/2" bolt pattern and includes bearings, races, seal, grease cap, wheel bolts, and lug nuts.


  • Hub-and-drum assembly includes:
    • Inner bearing and race
    • Outer bearing and race
    • Grease seal
    • Grease cap
    • Wheel bolts
    • Lug nuts


  • Application: 7,200-lb Dexter Axles
  • Drum dimensions: 12-1/4" x 2-1/2"
  • Bolt pattern: 8 on 6-1/2"
  • Inner bearing: 25580
    • Inner diameter: 1.75"
  • Outer bearing: 02475
    • Inner diameter: 1.25"
  • Grease seal: 10-36
    • Inner diameter: 2.25"
    • Outer diameter: 3.376"
  • Wheel stud size: 5/8"
  • Lug nut: 5/8" flange nut

Determining the Bolt Pattern

The first number in the bolt pattern is the number of bolt holes. The second number denotes the diameter, in inches, of the circle on which the bolt holes sit.

Measuring Bolt Pattern - Odd

To determine the bolt-circle diameter on wheels with an odd number of bolt holes, measure from the center of any bolt hole to the point halfway between the two bolt holes directly across from the first. (Example: "5 on 4-1/2" means 5 bolt holes with 4-1/2" measured to a point halfway between the opposite bolt holes.)

Measuring Bolt Pattern - Even

On wheels with an even number of bolt holes, measure from the center of one bolt hole to the center of the hole directly across from it. (Example: "8 on 6-1/2" means 8 bolt holes with 6-1/2" from the center of one hole to the center of another on the opposite side.)

Measuring Bolt Pattern - Side-to-Side

Measuring the distance from the center of one bolt hole on the wheel to the center of a bolt hole right next to it can also help to determine the bolt pattern.

  • If D = 2-5/8", then the bolt pattern is 5 on 4-1/2"
  • If D = 2-3/4", then the bolt pattern is 5 on 4-3/4"
  • If D = 3", then the bolt pattern is 5 on 5"
  • If D = 3-1/4", then the bolt pattern is 5 on 5-1/2"

8-393-6UC3-A Dexter 8 on 6-1/2 Complete Hub-and-Drum Assembly for Hydraulic or Electric Brakes - 7,200-lb Axle w/4 Bolt Flange -

Item # 8-393-6UC3-A

Customer Reviews

Dexter 8 on 6-1/2 Hub-and-Drum Assembly for 7,200-lb Axle - 4-Bolt Brake Flange - 8-393-6UC3-A

Average Customer Rating:  5.0 out of 5 stars   (2 Customer Reviews)

Hub-and-drum assembly features a 8 on 6-1/2" bolt pattern and includes bearings, races, seal, grease cap, wheel bolts, and lug nuts.

- 8-393-6UC3-A

I wanted to send pictures of completed installation of parts. Thank you for resolving problem with incorrect parts.

- 8-393-6UC3-A

Very professional company. My questions were, answered via your website. The orders I placed were filled promptly and there was great communication about two items that needed to be drop shipped from Dexter. One small item that was damaged in shipping was replaced with no hassle. I'm impressed and will order again.


Ask the Experts about this Dexter Axle Trailer Hubs and Drums

  • How Long Are the Wheel Studs on the Dexter 8 on 6-1/2 Hub-and-Drum Assembly 8-393-6UC3-A
    Yes, the wheel studs on the Dexter 8 on 6-1/2 Hub-and-Drum Assembly part # 8-393-6UC3-A will be long enough for most aluminum trailer wheels. The studs that are used on this hub are 5/8"-18 x 2-1/2". Therefore, they are 2-1/2" long.
    view full answer...
  • Replacement Dust Cap for Trailer Hub # 8-393-6UC3-A
    The replacement dust cap for the trailer hub you mentioned part # 8-393-6UC3-A is the part # 38605
    view full answer...
  • Dexter 7,200 Pound Axle Hub and Drum Assembly with 5/8 Inch Wheel Studs
    We have Dexter 8 on 6-1/2 Hub-and-Drum Assembly for 7,200-lb Axle - 9-Bolt and Newer 4-Bolt Brake Flange Item # 8-393-6UC3-A. It uses inner bearing 25580 and outer bearing 02475. This hub is compatible with 12-1/4 by 2-1/2 inch brakes # 23-428-429 which have a 4-bolt mounting pattern.
    view full answer...
  • Why Do Trailer Hubs Have Different Size Studs
    You are right that there are a few common stud sizes available on trailer hubs, and the difference has to do with what size wheels they are designed to work with. Larger studs are generally for larger/heavier wheels. You do need to ensure compatibility with a particular wheel when trying to match it up with a trailer hub The same wheel will not fit all possible stud sizes. The stud size doesn't affect the actual load rating on the trailer. For example, the Dexter 7,200-lb Hub and Drum...
    view full answer...
  • What Trailer Brakes Do I Need For My Gatormade Aardvark Trailer
    The brakes that you will need for your Gatormade Aardvark is the Dexter Electric Trailer Brake Kit - 12-1/4" - Left and Right Hand Assemblies - 7,200 lbs, part # 23-428-429. I have included a product description link and a video demo link below.
    view full answer...
  • Is The Distance Between Races On Dexter Hub 8-285-11 and 8-393-6UC3-A The Same?
    I had our warehouse measure the distance between the inner and outer races of the Dexter Trailer Hub and Drum # 8-285-11 and # 8-393-6UC3-A and they found that both of them have the exact same 1-3/4" measurement, so as long as you have the # 25580 inner bearing and # 02475 outer bearing combination either hub will fit fine. You will just need to match the hub to the correct brake assemblies as the # 8-285-11 uses 12-1/4" x 3-3/8" brake assemblies # 23-434-435 where the # 8-393-6UC3-A uses...
    view full answer...
  • Parts Needed to Add Brakes to Mobile Home Axle
    From the measurements you mentioned it sounds like you have a spindle that could be compatible with a hub and drum like the Dexter 8 on 6-1/2 # 8-393-6UC3-A, but by the time that you added a brake assembly like the # 23-428-429 you'd more than likely save yourself time, money and work by completely replacing the axle. If you wanted to just replace the hubs and add brakes, to confirm which hubs and brakes you'll want to use, you'll need to match the bearings on your current hubs. The Dexter...
    view full answer...
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  • Comparing Dexter Hub and Drum Assemblies 8-285-11 and 8-393-6UC3-A
    You will experience some reduced braking power when using the Dexter Trailer Hub and Drum Assembly # 8-393-6UC3-A with 12-1/4 x 2-1/2" brake assemblies compared to the # 8-285-11 with 12-1/4" x 3-3/8" brake assemblies. However there are other differences like the # 8-285-11 having 9/16" wheel studs where the # 8-393-6UC3-A has a larger 5/8" stud. Between the two I recommend going with the # 8-285-11 along with bearings # 25580 and # 02475, grease seals # RG06-070, lug nuts # 6-53, and...
    view full answer...

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Info for this part was:

Employee Jeff D
Video Edited:
Jeff D
Employee Jameson C
Expert Research:
Jameson C
Employee Kathleen M
Installed by:
Kathleen M
Employee Wilson B
Updated by:
Wilson B
Employee Mike S
Updated by:
Mike S
Employee Jenny M
Written by:
Jenny M

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